<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <title>React 实例</title>
    <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
    <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
    <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>


<script type="text/babel">
    class Hello extends React.Component {

        constructor(props) {
            super(props);
            this.state = {opacity: 1.0};
        }

        componentDidMount() {
            this.timer = setInterval(function () {
                var opacity = this.state.opacity;
                opacity -= .05;
                if (opacity < 0.1) {
                    opacity = 1.0;
                }
                this.setState({
                    opacity: opacity
                });
            }.bind(this), 100);
        }

        render () {
            return (
                <div style={{opacity: this.state.opacity}}>
                    Hello {this.props.name}
                </div>
            );
        }
    }

    ReactDOM.render(
        <Hello name="world"/>,
        document.body
    );
</script>

</body>
</html>